Pharrell turned 40 this month, but he doesn't look a day older than 20. It got us thinking—despite lifestyles that would make rock stars blush, many of your favorite rappers look like they haven't aged, ever. And as rap itself matures, it's fun to look back and see how some of our favorite artists have aged. Shit, with more rappers staying relevant into their 40s than ever before, maybe 40 is the new 30 even in hip-hop.

There's plenty of artists who haven't necessarily aged with grace, but there are plenty who have. Here's a look at 25 of your favorite rappers now, and then.

RELATED: Back in the Day: 40 Photos of Rappers as Teenagers
RELATED: 50 Photos of Rappers With Their Kids
RELATED: 40 Photos of Rappers as Kids

RELATED: Green Label - The Bands Artists Were in Before They Got Big